.. _SCREAM-DYAMOND-WINTER: SCREAM ======================================== **Provided by** Lawrence Livermore National Laboratory (LLNL), USA Model description ----------------- The Simple Cloud-Resolving E3SM Atmosphere Model (SCREAM) is a non-hydrostatic, spectral element atmospheric model that discretizes the globe on a cubed sphere. Details of the components that comprise the model can be found in `Caldwell et al. (2021) `__ and at our documentation page https://e3sm.org/about/organization/ngd-sub-projects/ngd-nonhydrostatic-atmosphere/1. Experiment runs ----------------- SCREAM 3.0km atmosphere-only ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Location: :file:`/fastdata/ka1081/DYAMOND/data/winter_data/DYAMOND_WINTER/LLNL/SCREAM-3km/DW-ATM/` containing the grid file :file:`atmos/fx/gn/grid.nc` Setup: Atmosphere-only, with land model from E3SMv1 and prescribed SST and sea ice Resolution: * The horizontal grid for dynamics is a cubed-sphere grid with 1024 spectral elements to a face, denoted ne1024. Within each element, fields are represented by degree 3 polynomials, using nodal values on a 4x4 grid of Gauss-Lobatto-Lengdre (GLL) nodes. The edge and corner nodes are shared by adjacent elements, resulting in an average spacing between GLL nodes of ~3.25 km. Physical parameterizations are computed on a uniformly spaced 2x2 physics grid within each spectral element to avoid the nonuniform spacing of the GLL nodes. All output variables are on this physics grid. * In the vertical, SCREAM has a 128 layer grid with the model top at 40km (2.25 hPa) and a sponge layer in the top 14 layers. * The land model for this simulation is taken from E3SMv1 and run at 1/8 degree. * Prescribed SST and sea ice are applied on the ocean grid from `Caldwell et al (2019) `__ , which has 18 km grid spacing in the tropics tapering to 6 km spacing near the poles. * The experiment run with a 75 second coupling timestep across model components and the radiation scheme was run every 5 min. Each one of the schemes had their own timesteps, pleas see `Caldwell et al. (2021) `__ . Comments: * Detailed description of the experiment, the model setup and observations for evaluations are given in `Caldwell et al. (2021) `__ . Data description: :ref:`DYAMOND_WINTER-Models-SCREAM-3km` Contact person: `Peter Caldwell (LLNL) `__ and `Christopher Terai (LLNL) `__ See also --------